1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2019 NXP.
4 */
5
6#include <drm/drm_atomic.h>
7#include <drm/drm_atomic_helper.h>
8#include <drm/drm_blend.h>
9#include <drm/drm_fb_dma_helper.h>
10#include <drm/drm_framebuffer.h>
11#include <drm/drm_gem_atomic_helper.h>
12#include <drm/drm_gem_dma_helper.h>
13
14#include "dcss-dev.h"
15#include "dcss-kms.h"
16
17static const u32 dcss_common_formats[] = {
18 /* RGB */
19 DRM_FORMAT_ARGB8888,
20 DRM_FORMAT_XRGB8888,
21 DRM_FORMAT_ABGR8888,
22 DRM_FORMAT_XBGR8888,
23 DRM_FORMAT_RGBA8888,
24 DRM_FORMAT_RGBX8888,
25 DRM_FORMAT_BGRA8888,
26 DRM_FORMAT_BGRX8888,
27 DRM_FORMAT_XRGB2101010,
28 DRM_FORMAT_XBGR2101010,
29 DRM_FORMAT_RGBX1010102,
30 DRM_FORMAT_BGRX1010102,
31 DRM_FORMAT_ARGB2101010,
32 DRM_FORMAT_ABGR2101010,
33 DRM_FORMAT_RGBA1010102,
34 DRM_FORMAT_BGRA1010102,
35};
36
37static const u64 dcss_video_format_modifiers[] = {
38 DRM_FORMAT_MOD_LINEAR,
39 DRM_FORMAT_MOD_INVALID,
40};
41
42static const u64 dcss_graphics_format_modifiers[] = {
43 DRM_FORMAT_MOD_VIVANTE_TILED,
44 DRM_FORMAT_MOD_VIVANTE_SUPER_TILED,
45 DRM_FORMAT_MOD_LINEAR,
46 DRM_FORMAT_MOD_INVALID,
47};
48
49static inline struct dcss_plane *to_dcss_plane(struct drm_plane *p)
50{
51 return container_of(p, struct dcss_plane, base);
52}
53
54static inline bool dcss_plane_fb_is_linear(const struct drm_framebuffer *fb)
55{
56 return ((fb->flags & DRM_MODE_FB_MODIFIERS) == 0) ||
57 ((fb->flags & DRM_MODE_FB_MODIFIERS) != 0 &&
58 fb->modifier == DRM_FORMAT_MOD_LINEAR);
59}
60
61static void dcss_plane_destroy(struct drm_plane *plane)
62{
63 struct dcss_plane *dcss_plane = container_of(plane, struct dcss_plane,
64 base);
65
66 drm_plane_cleanup(plane);
67 kfree(objp: dcss_plane);
68}
69
70static bool dcss_plane_format_mod_supported(struct drm_plane *plane,
71 u32 format,
72 u64 modifier)
73{
74 switch (plane->type) {
75 case DRM_PLANE_TYPE_PRIMARY:
76 switch (format) {
77 case DRM_FORMAT_ARGB8888:
78 case DRM_FORMAT_XRGB8888:
79 case DRM_FORMAT_ARGB2101010:
80 return modifier == DRM_FORMAT_MOD_LINEAR ||
81 modifier == DRM_FORMAT_MOD_VIVANTE_TILED ||
82 modifier == DRM_FORMAT_MOD_VIVANTE_SUPER_TILED;
83 default:
84 return modifier == DRM_FORMAT_MOD_LINEAR;
85 }
86 break;
87 case DRM_PLANE_TYPE_OVERLAY:
88 return modifier == DRM_FORMAT_MOD_LINEAR;
89 default:
90 return false;
91 }
92}
93
94static const struct drm_plane_funcs dcss_plane_funcs = {
95 .update_plane = drm_atomic_helper_update_plane,
96 .disable_plane = drm_atomic_helper_disable_plane,
97 .destroy = dcss_plane_destroy,
98 .reset = drm_atomic_helper_plane_reset,
99 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
100 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
101 .format_mod_supported = dcss_plane_format_mod_supported,
102};
103
104static bool dcss_plane_can_rotate(const struct drm_format_info *format,
105 bool mod_present, u64 modifier,
106 unsigned int rotation)
107{
108 bool linear_format = !mod_present || modifier == DRM_FORMAT_MOD_LINEAR;
109 u32 supported_rotation = DRM_MODE_ROTATE_0;
110
111 if (!format->is_yuv && linear_format)
112 supported_rotation = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
113 DRM_MODE_REFLECT_MASK;
114 else if (!format->is_yuv &&
115 (modifier == DRM_FORMAT_MOD_VIVANTE_TILED ||
116 modifier == DRM_FORMAT_MOD_VIVANTE_SUPER_TILED))
117 supported_rotation = DRM_MODE_ROTATE_MASK |
118 DRM_MODE_REFLECT_MASK;
119 else if (format->is_yuv && linear_format &&
120 (format->format == DRM_FORMAT_NV12 ||
121 format->format == DRM_FORMAT_NV21))
122 supported_rotation = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
123 DRM_MODE_REFLECT_MASK;
124
125 return !!(rotation & supported_rotation);
126}
127
128static bool dcss_plane_is_source_size_allowed(u16 src_w, u16 src_h, u32 pix_fmt)
129{
130 if (src_w < 64 &&
131 (pix_fmt == DRM_FORMAT_NV12 || pix_fmt == DRM_FORMAT_NV21))
132 return false;
133 else if (src_w < 32 &&
134 (pix_fmt == DRM_FORMAT_UYVY || pix_fmt == DRM_FORMAT_VYUY ||
135 pix_fmt == DRM_FORMAT_YUYV || pix_fmt == DRM_FORMAT_YVYU))
136 return false;
137
138 return src_w >= 16 && src_h >= 8;
139}
140
141static int dcss_plane_atomic_check(struct drm_plane *plane,
142 struct drm_atomic_state *state)
143{
144 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
145 plane);
146 struct dcss_plane *dcss_plane = to_dcss_plane(p: plane);
147 struct dcss_dev *dcss = plane->dev->dev_private;
148 struct drm_framebuffer *fb = new_plane_state->fb;
149 bool is_primary_plane = plane->type == DRM_PLANE_TYPE_PRIMARY;
150 struct drm_gem_dma_object *dma_obj;
151 struct drm_crtc_state *crtc_state;
152 int hdisplay, vdisplay;
153 int min, max;
154 int ret;
155
156 if (!fb || !new_plane_state->crtc)
157 return 0;
158
159 dma_obj = drm_fb_dma_get_gem_obj(fb, plane: 0);
160 WARN_ON(!dma_obj);
161
162 crtc_state = drm_atomic_get_existing_crtc_state(state,
163 crtc: new_plane_state->crtc);
164
165 hdisplay = crtc_state->adjusted_mode.hdisplay;
166 vdisplay = crtc_state->adjusted_mode.vdisplay;
167
168 if (!dcss_plane_is_source_size_allowed(src_w: new_plane_state->src_w >> 16,
169 src_h: new_plane_state->src_h >> 16,
170 pix_fmt: fb->format->format)) {
171 DRM_DEBUG_KMS("Source plane size is not allowed!\n");
172 return -EINVAL;
173 }
174
175 dcss_scaler_get_min_max_ratios(scl: dcss->scaler, ch_num: dcss_plane->ch_num,
176 min: &min, max: &max);
177
178 ret = drm_atomic_helper_check_plane_state(plane_state: new_plane_state, crtc_state,
179 min_scale: min, max_scale: max, can_position: !is_primary_plane,
180 can_update_disabled: false);
181 if (ret)
182 return ret;
183
184 if (!new_plane_state->visible)
185 return 0;
186
187 if (!dcss_plane_can_rotate(format: fb->format,
188 mod_present: !!(fb->flags & DRM_MODE_FB_MODIFIERS),
189 modifier: fb->modifier,
190 rotation: new_plane_state->rotation)) {
191 DRM_DEBUG_KMS("requested rotation is not allowed!\n");
192 return -EINVAL;
193 }
194
195 if ((new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0 ||
196 new_plane_state->crtc_x + new_plane_state->crtc_w > hdisplay ||
197 new_plane_state->crtc_y + new_plane_state->crtc_h > vdisplay) &&
198 !dcss_plane_fb_is_linear(fb)) {
199 DRM_DEBUG_KMS("requested cropping operation is not allowed!\n");
200 return -EINVAL;
201 }
202
203 if ((fb->flags & DRM_MODE_FB_MODIFIERS) &&
204 !plane->funcs->format_mod_supported(plane,
205 fb->format->format,
206 fb->modifier)) {
207 DRM_DEBUG_KMS("Invalid modifier: %llx", fb->modifier);
208 return -EINVAL;
209 }
210
211 return 0;
212}
213
214static void dcss_plane_atomic_set_base(struct dcss_plane *dcss_plane)
215{
216 struct drm_plane *plane = &dcss_plane->base;
217 struct drm_plane_state *state = plane->state;
218 struct dcss_dev *dcss = plane->dev->dev_private;
219 struct drm_framebuffer *fb = state->fb;
220 const struct drm_format_info *format = fb->format;
221 struct drm_gem_dma_object *dma_obj = drm_fb_dma_get_gem_obj(fb, plane: 0);
222 unsigned long p1_ba = 0, p2_ba = 0;
223
224 if (!format->is_yuv ||
225 format->format == DRM_FORMAT_NV12 ||
226 format->format == DRM_FORMAT_NV21)
227 p1_ba = dma_obj->dma_addr + fb->offsets[0] +
228 fb->pitches[0] * (state->src.y1 >> 16) +
229 format->char_per_block[0] * (state->src.x1 >> 16);
230 else if (format->format == DRM_FORMAT_UYVY ||
231 format->format == DRM_FORMAT_VYUY ||
232 format->format == DRM_FORMAT_YUYV ||
233 format->format == DRM_FORMAT_YVYU)
234 p1_ba = dma_obj->dma_addr + fb->offsets[0] +
235 fb->pitches[0] * (state->src.y1 >> 16) +
236 2 * format->char_per_block[0] * (state->src.x1 >> 17);
237
238 if (format->format == DRM_FORMAT_NV12 ||
239 format->format == DRM_FORMAT_NV21)
240 p2_ba = dma_obj->dma_addr + fb->offsets[1] +
241 (((fb->pitches[1] >> 1) * (state->src.y1 >> 17) +
242 (state->src.x1 >> 17)) << 1);
243
244 dcss_dpr_addr_set(dpr: dcss->dpr, ch_num: dcss_plane->ch_num, luma_base_addr: p1_ba, chroma_base_addr: p2_ba,
245 pitch: fb->pitches[0]);
246}
247
248static bool dcss_plane_needs_setup(struct drm_plane_state *state,
249 struct drm_plane_state *old_state)
250{
251 struct drm_framebuffer *fb = state->fb;
252 struct drm_framebuffer *old_fb = old_state->fb;
253
254 return state->crtc_x != old_state->crtc_x ||
255 state->crtc_y != old_state->crtc_y ||
256 state->crtc_w != old_state->crtc_w ||
257 state->crtc_h != old_state->crtc_h ||
258 state->src_x != old_state->src_x ||
259 state->src_y != old_state->src_y ||
260 state->src_w != old_state->src_w ||
261 state->src_h != old_state->src_h ||
262 fb->format->format != old_fb->format->format ||
263 fb->modifier != old_fb->modifier ||
264 state->rotation != old_state->rotation ||
265 state->scaling_filter != old_state->scaling_filter;
266}
267
268static void dcss_plane_atomic_update(struct drm_plane *plane,
269 struct drm_atomic_state *state)
270{
271 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
272 plane);
273 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
274 plane);
275 struct dcss_plane *dcss_plane = to_dcss_plane(p: plane);
276 struct dcss_dev *dcss = plane->dev->dev_private;
277 struct drm_framebuffer *fb = new_state->fb;
278 struct drm_crtc_state *crtc_state;
279 bool modifiers_present;
280 u32 src_w, src_h, dst_w, dst_h;
281 struct drm_rect src, dst;
282 bool enable = true;
283 bool is_rotation_90_or_270;
284
285 if (!fb || !new_state->crtc || !new_state->visible)
286 return;
287
288 crtc_state = new_state->crtc->state;
289 modifiers_present = !!(fb->flags & DRM_MODE_FB_MODIFIERS);
290
291 if (old_state->fb && !drm_atomic_crtc_needs_modeset(state: crtc_state) &&
292 !dcss_plane_needs_setup(state: new_state, old_state)) {
293 dcss_plane_atomic_set_base(dcss_plane);
294 return;
295 }
296
297 src = plane->state->src;
298 dst = plane->state->dst;
299
300 /*
301 * The width and height after clipping.
302 */
303 src_w = drm_rect_width(r: &src) >> 16;
304 src_h = drm_rect_height(r: &src) >> 16;
305 dst_w = drm_rect_width(r: &dst);
306 dst_h = drm_rect_height(r: &dst);
307
308 if (plane->type == DRM_PLANE_TYPE_OVERLAY &&
309 modifiers_present && fb->modifier == DRM_FORMAT_MOD_LINEAR)
310 modifiers_present = false;
311
312 dcss_dpr_format_set(dpr: dcss->dpr, ch_num: dcss_plane->ch_num,
313 format: new_state->fb->format,
314 modifier: modifiers_present ? fb->modifier :
315 DRM_FORMAT_MOD_LINEAR);
316 dcss_dpr_set_res(dpr: dcss->dpr, ch_num: dcss_plane->ch_num, xres: src_w, yres: src_h);
317 dcss_dpr_set_rotation(dpr: dcss->dpr, ch_num: dcss_plane->ch_num,
318 rotation: new_state->rotation);
319
320 dcss_plane_atomic_set_base(dcss_plane);
321
322 is_rotation_90_or_270 = new_state->rotation & (DRM_MODE_ROTATE_90 |
323 DRM_MODE_ROTATE_270);
324
325 dcss_scaler_set_filter(scl: dcss->scaler, ch_num: dcss_plane->ch_num,
326 scaling_filter: new_state->scaling_filter);
327
328 dcss_scaler_setup(scl: dcss->scaler, ch_num: dcss_plane->ch_num,
329 format: new_state->fb->format,
330 src_xres: is_rotation_90_or_270 ? src_h : src_w,
331 src_yres: is_rotation_90_or_270 ? src_w : src_h,
332 dst_xres: dst_w, dst_yres: dst_h,
333 vrefresh_hz: drm_mode_vrefresh(mode: &crtc_state->mode));
334
335 dcss_dtg_plane_pos_set(dtg: dcss->dtg, ch_num: dcss_plane->ch_num,
336 px: dst.x1, py: dst.y1, pw: dst_w, ph: dst_h);
337 dcss_dtg_plane_alpha_set(dtg: dcss->dtg, ch_num: dcss_plane->ch_num,
338 format: fb->format, alpha: new_state->alpha >> 8);
339
340 if (!dcss_plane->ch_num && (new_state->alpha >> 8) == 0)
341 enable = false;
342
343 dcss_dpr_enable(dpr: dcss->dpr, ch_num: dcss_plane->ch_num, en: enable);
344 dcss_scaler_ch_enable(scl: dcss->scaler, ch_num: dcss_plane->ch_num, en: enable);
345
346 if (!enable)
347 dcss_dtg_plane_pos_set(dtg: dcss->dtg, ch_num: dcss_plane->ch_num,
348 px: 0, py: 0, pw: 0, ph: 0);
349
350 dcss_dtg_ch_enable(dtg: dcss->dtg, ch_num: dcss_plane->ch_num, en: enable);
351}
352
353static void dcss_plane_atomic_disable(struct drm_plane *plane,
354 struct drm_atomic_state *state)
355{
356 struct dcss_plane *dcss_plane = to_dcss_plane(p: plane);
357 struct dcss_dev *dcss = plane->dev->dev_private;
358
359 dcss_dpr_enable(dpr: dcss->dpr, ch_num: dcss_plane->ch_num, en: false);
360 dcss_scaler_ch_enable(scl: dcss->scaler, ch_num: dcss_plane->ch_num, en: false);
361 dcss_dtg_plane_pos_set(dtg: dcss->dtg, ch_num: dcss_plane->ch_num, px: 0, py: 0, pw: 0, ph: 0);
362 dcss_dtg_ch_enable(dtg: dcss->dtg, ch_num: dcss_plane->ch_num, en: false);
363}
364
365static const struct drm_plane_helper_funcs dcss_plane_helper_funcs = {
366 .atomic_check = dcss_plane_atomic_check,
367 .atomic_update = dcss_plane_atomic_update,
368 .atomic_disable = dcss_plane_atomic_disable,
369};
370
371struct dcss_plane *dcss_plane_init(struct drm_device *drm,
372 unsigned int possible_crtcs,
373 enum drm_plane_type type,
374 unsigned int zpos)
375{
376 struct dcss_plane *dcss_plane;
377 const u64 *format_modifiers = dcss_video_format_modifiers;
378 int ret;
379
380 if (zpos > 2)
381 return ERR_PTR(error: -EINVAL);
382
383 dcss_plane = kzalloc(size: sizeof(*dcss_plane), GFP_KERNEL);
384 if (!dcss_plane) {
385 DRM_ERROR("failed to allocate plane\n");
386 return ERR_PTR(error: -ENOMEM);
387 }
388
389 if (type == DRM_PLANE_TYPE_PRIMARY)
390 format_modifiers = dcss_graphics_format_modifiers;
391
392 ret = drm_universal_plane_init(dev: drm, plane: &dcss_plane->base, possible_crtcs,
393 funcs: &dcss_plane_funcs, formats: dcss_common_formats,
394 ARRAY_SIZE(dcss_common_formats),
395 format_modifiers, type, NULL);
396 if (ret) {
397 DRM_ERROR("failed to initialize plane\n");
398 kfree(objp: dcss_plane);
399 return ERR_PTR(error: ret);
400 }
401
402 drm_plane_helper_add(plane: &dcss_plane->base, funcs: &dcss_plane_helper_funcs);
403
404 ret = drm_plane_create_zpos_immutable_property(plane: &dcss_plane->base, zpos);
405 if (ret)
406 return ERR_PTR(error: ret);
407
408 drm_plane_create_scaling_filter_property(plane: &dcss_plane->base,
409 BIT(DRM_SCALING_FILTER_DEFAULT) |
410 BIT(DRM_SCALING_FILTER_NEAREST_NEIGHBOR));
411
412 drm_plane_create_rotation_property(plane: &dcss_plane->base,
413 DRM_MODE_ROTATE_0,
414 DRM_MODE_ROTATE_0 |
415 DRM_MODE_ROTATE_90 |
416 DRM_MODE_ROTATE_180 |
417 DRM_MODE_ROTATE_270 |
418 DRM_MODE_REFLECT_X |
419 DRM_MODE_REFLECT_Y);
420
421 dcss_plane->ch_num = zpos;
422
423 return dcss_plane;
424}
425

source code of linux/drivers/gpu/drm/imx/dcss/dcss-plane.c